Effect of Nb2O5 on the microstructure and mechanical properties of TiAl based composites produced by hot pressing

Effect of Nb2O5 on the microstructure and mechanical properties of TiAl based composites produced by hot pressing
复制标题

Nb2O5对热压TiAl基复合材料显微组织和力学性能的影响

DOI:
10.1016/j.msea.2011.04.062
复制
发表时间:
2011-08
影响因子:
6.4
通讯作者:
--
中科院分区:
材料科学1区
文献类型:
--
作者:

文献摘要

参考文献

被引文献

相似文献

采用热压辅助反应合成(HPRS)法,以Ti、Al和Nb 2 O 5为原料,成功地制备了Al 2 O3颗粒增强TiAl原位复合材料。所制备的复合材料主要由TiAl、Al 2 O3、NbAl 3以及少量的Ti 3Al相组成。原位生成的细小Al 2 O3颗粒倾向于弥散分布在TiAl基体晶界上,使复合材料中基体晶粒细化和Al 2 O3分布均匀得到了很好的结合。随着Nb 2 O 5含量的增加,TiAl基复合材料的洛氏硬度和密度逐渐增加,当Nb 2 O 5含量达到6.62wt.%时,复合材料的抗弯强度和断裂韧性达到最大值,分别为634 MPa和9.78 MPa m1/2。并对强化机理进行了探讨。
In situ composites of TiAl reinforced with Al2O3particles are successfully synthesized from an elemental powder mixture of Ti, Al and Nb2O5by the hot-press-assisted reaction synthesis (HPRS) method. The as-prepared composites are mainly composed of TiAl, Al2O3, NbAl3, as well as small amounts of the Ti3Al phase. The in situ formed fine Al2O3particles tend to disperse on the matrix grain boundaries of TiAl resulting in an excellent combination of matrix grain refinement and uniform Al2O3distribution in the composites. The Rockwell hardness and densities of TiAl based composites increase gradually with increasing Nb2O5content, and the flexural strength and fracture toughness of the composites have the maximum values of 634 MPa and 9.78 MPa m1/2, respectively, when the Nb2O5content reaches 6.62 wt.%. The strengthening mechanism was also discussed.
DOI: 10.1016/j.intermet.2004.12.005
发表时间: 2005-09
期刊: Intermetallics
影响因子: 4.4
作者:
M. A. Muñoz-Morris;I. Gil;D. G. Morris
通讯作者: M. A. Muñoz-Morris;I. Gil;D. G. Morris
DOI: 10.1016/s1000-9361(08)60174-0
发表时间: 2008-12-01
影响因子: 5.7
作者:
Ai Taotao
通讯作者: Ai Taotao
TiAl-Al2O3复合材料的反应合成
DOI: 10.4028/www.scientific.net/kem.336-338.1397
发表时间: 2007-04
期刊: Key engineering material
影响因子: --
作者:
Jian Feng Zhu;JiQiang Gao;Fen Wang
通讯作者: Fen Wang
DOI: 10.1016/0921-5093(94)03282-3
发表时间: 1995-02
影响因子: 6.4
作者:
M. Wood;M. Ward-Close
通讯作者: M. Wood;M. Ward-Close
DOI: 10.1016/j.intermet.2005.12.013
发表时间: 2006-01-01
期刊: INTERMETALLICS
影响因子: 4.4
作者:
Lapin, J.;Pelachova, T.
通讯作者: Pelachova, T.